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(12) Patent Application Publication (10) Pub. No.: US 2008/0107742 A1 Hare (43) Pub

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(12) Patent Application Publication (10) Pub. No.: US 2008/0107742 A1 Hare (43) Pub US 200801 07742A1 (19) United States (12) Patent Application Publication (10) Pub. No.: US 2008/0107742 A1 Hare (43) Pub. Date: May 8, 2008 (54) COMPOSITIONS AND METHODS FOR Publication Classification REMOVINGURUSHOLAND TREATING THE RESULTING SKIN CONDITION (51) Int. Cl. A6II 3L/25 (2006.01) (76) Inventor: William D. Hare, Princeton, NJ (US) A6II 3L/045 (2006.01) A6IR 9/14 (2006.01) A6IP 7/00 (2006.01) Correspondence Address: (52) U.S. Cl. ........................... 424/489: 514/729: 514/692 WILLAM DOUGLASHARE (57) ABSTRACT 3 ANDERSON LANE The present application is directed to various compositions to PRINCETON, NJ 08540 (US) treat the itching and conditions that result from contracting (21) Appl. No.: 11/930,098 poison ivy, poison oak, and poison Sumac, as well as other plant and Substances that contain Substances that lead to askin (22) Filed: Oct. 31, 2007 reaction but that upon removal alleviate the symptoms of the condition. In particular, the compositions described herein Related U.S. Application Data are useful for removing urushiol after it has contacted the skin. The compositions include granules or other Scrubbing (62) Division of application No. 10/906,491, filed on Feb. means to reach the urushiol in the skin, a mixture of Surfac 23, 2005. tants to form a complex with the urushiol, counter-irritants to provide a soothing sensation to the irritated skin, and other (60) Provisional application No. 60/547,038, filed on Feb. functional ingredients to provide additional benefits to the 24, 2004. individual who has contacted urushiol. US 2008/01 07742 A1 May 8, 2008 COMPOSITIONS AND METHODS FOR REMOVING plants produce small clusters of ivory-white fruits, each with URUSHOL AND TREATING THE RESULTING a papery outer exocarp, a soft waxy mesocarp and a hard SKIN CONDITION Stony endocarp Surrounding the seed. The fruits of related shrubs such as squaw bush, lemonadeberry (Rhus integrifo TECHNICAL FIELD OF THE INVENTION lia) and Sugar bush (Rhus ovata) are reddish with a sticky pubescent exocarp. The old adage about poison oak and poi 0001. The technical field of the invention relates to con son ivy is quite accurate: "Leaves of three, let it be; berries cepts, compositions, and methods for removingurushiol from white, poisonous sight.” the skin, after a reaction has occurred, to thereby eliminate the irritant and itching, and allow the skin to heal. 0007 Freshly cut stems exude a sticky, terpene oleoresin that oxidizes and polymerizes into a shiny black lacquer BACKGROUND OF THE INVENTION resembling pruning sealer. The resinous sap is produced in resin canals of the stems, roots, leaves and flowers. Cross 0002 Poison Ivy, Poison Oak and Other Plants that Con sections of poison oak stems show distinct concentric annual tain Urushiol rings (ring-porous wood). Numerous resin canals appear as 0003 Poison ivy (Toxicodendron radicans), poison oak tiny black dots and are confined to the phloem layer just inside (Toxicodendron diversilobum), poison Sumac, and various the bark. Dark resin canals (appearing as black striations) also other similar plants cause allergic contact dermatitis in occur in the waxy mesocarp of the fruits just beneath the people. These plants are variously found throughout the papery skin. Abundant resin canals is one of the reasons United States. A subspecies of poison ivy (T. radicans; ssp. poison oak and poison ivy are placed in the genus Toxicoden dron rather than the older genus Rhus. Toxicodendron is also Divaricatum) is native to southern Baja California and the updated generic name for poison Sumac (Tvernix) and the Sonora, Mexico. Reports show that there are at least four Japanese lacquer tree (T. vernicifluum), the commercial native species of Toxicodendron in North America, including Source of natural lacquer. The resin canals also contain seven subspecies of poison ivy, and three species in Malaysia urushiol, the insidious allergen that gives poison oak its bad and China, including two subspecies of poison ivy, one in reputation. The name is derived from “urushi’, Japanese China and one in Japan. name for lacquer made from the sap of the Japanese lacquer 0004 Poison oak is a widespread deciduous shrub tree (“kiurushi' or “urushiki'). throughout the mountains and Valleys of California, generally at elevations below 5,000 feet. In some locations it grows as 0008. In addition to poison oak, poison ivy and poison a climbing vine with aerial (adventitious) roots that adhere to Sumac, a number of other species in the Sumac Family con the trunks of oaks and Sycamores. Poison oak also forms tain urushiol mixtures. In Japan, dermatitis reactions have dense thickets in chaparral and coastal Sage scrub, particu been reported from contact with lacquered objects (from larly in central and northern California. Poison oak regener Japanese lacquer tree) Such as bar tops, rifle stocks and toilet ates readily after disturbances Such as fire and the clearing of seats. Dermatitis has also been reported in people handling land. Rocky Mountain poison oak (Toxicodendron rydbergii) mangoes (Mangifera indica), shells of cashew nuts (Anacar occurs in canyons throughout the Western United States and dium occidentale), the Rengas tree (Gluta renghas), Burmese Canada. Because the two species of Western poison oak often lacquer tree (Melanorrhoea usitata) and two attractive Car exhibit a viney growth form, they are considered to be sub ibbean shrubs, Metopium toxiferum and Conocladia dodo species of Eastern poison ivy. naea. The name Rengas actually refers to several genera of large Malaysian trees with resinous sap that blackens when 0005 The pinnately trifoliate leaves typically have three exposed to the air. Urushiols also occur in the seeds of Ginkgo or five leaflets, the terminal leaf being on a slender rachis biloba (Ginkgoaceae) and in several genera of the Proteaceae. (e.g., a stalk or petiolule). Eastern poison ivy often has a longer rachis and the leaflet margins tend to be less lobed and 0009 Urushiol Oil, Structure and Transport Serrated (i.e., less "oak-like'). In the similar-appearing squaw 0010 Urushiol is the broad term given to the substance in bush (Rhus trilobata) the terminal leaflet is sessile (without a the sap of poison ivy (Toxicodendron radicans), poison oak stalk). Like many members of the Sumac Family (Anacardi (Toxicodendron diversilobum), poison Sumac, and other aceae) new foliage and autumn leaves often turn brilliant plants that causes allergic contact dermatitis in people. shades of pink and red due to anthocyanin pigments. In the Urushiol is a clear, Sticky oil, causes an allergic reaction, and Eastern United States poison ivy is often mistaken for another is potent even on dead or dried plants, which causes urushiol common native called Virginia creeper (Parthenocissus quin to be hazardous even during the winter months. Some reports quefolia), which has a similar growth habit and attractive estimate that between approximately 50% and 70% of the autumn foliage, but with five leaflets rather than three. Vir U.S. population is allergic to urushiol. In fact, there is some ginia creeper belongs to the grape family (Vitaceae) along clinical evidence shows that no one is completely immune to with the common wild grape (Vitis girdiana). the urushiol but that the sensitivity is a matter of degree: some 0006. In poison ivy, during the late spring loose clusters people are sensitive to Small amounts while others react only (panicles) of small greenish-white flowers are produced in the to large amounts. Poison oak and poison ivy account for an leaf axils. Functional male and female flowers are typically estimated ten percent of lost work time in the U.S. Forest produced on separate plants (dioecious), or occasionally, uni Service. In fact, hundreds of fire fighters who battle summer sexual and bisexual flowers may occur on the same plant and fall blazes in California's coastal ranges are so severely (polygamous). Male flowers contain five stamens and a rudi affected that they are unable to work. People who breathe in mentary pistil Surrounded by five cream-colored petals and the Smoke and soot may develop serious inflammation of five sepals. Female flowers have a fertile pistill (gynoecium) respiratory mucous membranes. Because of the serious eco and reduced, sterile stamens. During Summer and fall, female nomic impact due to lost employment time, poison oak inju US 2008/01 07742 A1 May 8, 2008 ries' are covered by Workers’ Compensation Insurance in ivy. Poison ivy mostly contains a mixture of four Saturated California. It is reported that the monetary cost of this afflic pentadecylcatechols (with 15-carbon side chain), while poi tion is approximately one percent of the state's workers’ Son oak contains a mixture of four heptadecylcatechols (with compensation budget. 17-carbon side chain). 0011 Reports indicate that urushiol is actually a mixture 0015. As indicated above, the side chain may be saturated of phenolic compounds that are known as catechols, which or unsaturated with one, two, or three double bonds. Accord are potent benzene ring compounds having a long side-chain ing to some studies, the immune reaction and specificity of of 15 or 17 carbon atoms. The side chain may be saturated or the catechol molecule is a function of the long side-chain. As unsaturated with one, two, or three double bonds. It is might be expected, the urushiol can vary based on the plant in reported that the immune reaction and specificity of the cat which it is found. For example, the urushiol from poison oak echol molecule is determined by the long side-chain. Poison contains mostly catechols with 17-carbon side-chains (hep oak urushiol contains mostly catechols with 17 carbon side tadecylcatechols). In contrast, the urushiol from poison ivy chains (heptadecylcatechols), while poison ivy and poison and poison Sumac contain mostly 15 carbon side-chains (pen Sumac contain mostly 15 carbon side-chains (pentadecylcat tadecylcatechols).
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